Determination of the Critical Velocity of Molten Metal Flow in Casting Mould Sprue

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
© 2019 by IJETT Journal
Volume-67 Issue-10
Year of Publication : 2019
Authors : Francis Inegbedion, John A. Akpobi


MLA Style: Francis Inegbedion, John A. Akpobi   "Determination of the Critical Velocity of Molten Metal Flow in Casting Mould Sprue" International Journal of Engineering Trends and Technology 67.10 (2019):199-205.

APA Style: Francis Inegbedion, John A. Akpobi Papageorgiou, Determination of the Critical Velocity of Molten Metal Flow in Casting Mould Sprue International Journal of Engineering Trends and Technology, 67(10),199-205

Casting is a manufacturing process in which molten metal is poured through a gating system to fill a mould cavity where it solidifies. Variations in casting parameters chosen by different researchers have led to significant variations in casting guidelines. These have forced foundry-men to carry out a number of trial and error runs to create guidelines based on their own experience. This has resulted in defects occurring in casting during the mould filling process. The authors aimed at determining the critical height and critical velocity of molten metal flow in the mould sprue. The continuity equation was used to describe the velocity distribution of the molten metal flow and the finite element method was used for the analysis. The authors established the critical flow velocity of molten metal down the sprue as 2.755 x 103mm/s. The results obtained were compared with the Reynolds number and literature. Various casts were produced and it was observed that sprue height below the critical drop height prevented casting defects.


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Critical Velocity, Finite Element Method, Continuity Equation, Mould Sprue